There are many stories that can be told all over the world that probably are not on your radar. This is one of them. Even if you know the facts (the numbers in that case), seeing that playing in front of your eyes is something completely different. It's devastating watching events unfolding especially when it's clear that some things might have been avoidable.
With some American star power (Brody and Robbins in this case in smaller roles), the movie depicts war and the cruelties to the common folk. So you won't be able to see much fighting (though there are still quite a lot of war scenes), but the effects it has on civilians. A difficult movie, not only because of the running time, but a very well made one. Even if you're not that much interested in History, this is able to grab you and hold your breath/attention until the end